Stands up to the heat. Never backs down from the cold.

Ultrex pultruded fiberglass is specifically designed to withstand the rigors of time and our harshest climates. Where vinyl distorts or breaks down in extreme heat, Ultrex maintains consistent performance through the changes of seasons.

Minimal expansion for a stronger seal.

Because Ultrex matches the extremely low thermal expansion of glass, windows and doors maintain a stronger seal while reducing the risk of seal failures and air leakage into your home. Low thermal expansion means siding stays straight and tight for a weather barrier that is impervious to moisture.

Apex Ultrex Siding System

is the most revolutionary home exterior on the planet. Made of entirely of Ultrex® fiberglass, APEX is a new category of home siding that is stronger and more durable than fiber cement, impervious to moisture, and features a rich, bold acrylic finish.